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Empty Square in Python

This Python program prompts the user to input a symbol and a width, then displays a hollow square with the specified width. The square's outer border is created using the provided symbol, while the inner part of the square remains empty, creating a hollow effect. This program is an excellent exercise for practicing nested loops in Python, as the outer loop handles the rows while the inner loop manages the columns. The hollow square structure is a great way to demonstrate how to work with user inputs and conditional statements to create dynamic patterns. Learning how to create shapes and patterns like this is an important skill in Python programming, especially for those interested in game development, graphics programming, or even data visualization. By using a simple symbol and adjusting the width, this program provides an easy introduction to handling loops and conditions in Python, while simultaneously building the user’s understanding of how to manipulate character output effectively.



Group

Mastering Flow Control in Python

Objective

Develop a Python program that prompts the user for a symbol and a width, and displays a hollow square of that width using that symbol for the outer border, as shown in this example:

Enter a symbol: 4
Enter the desired width: 3

444
4 4
444

Example Python Exercise

 Copy Python Code 
# Prompt the user to enter a symbol
symbol = input("Enter a symbol: ")

# Prompt the user to enter the desired width
width = int(input("Enter the desired width: "))

# Use a while loop to display the hollow square
i = 0
while i < width:
    if i == 0 or i == width - 1:
        print(symbol * width)
    else:
        print(symbol + " " * (width - 2) + symbol)
    i += 1

 Output

Enter a symbol: 4
Enter the desired width: 3
444
4 4
444

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